Re: scared - gastritis or stomach cancer
Well, based upon the history and symptoms you've described, it would inconsistent with gastrointestinal cancer. My question at this point is whether you've had your most recent symptoms evaluated? There are many conditions which can produce bloating and upper epigastric pain. Pressure at the diaphragm can produce muscle spasms, called splenic flexure, which likely explains the "twinges" which concern you.
You need to relax and set aside any fears you have that this might be related to cancer. It's not the case. You also need to obtain a referral to a gastroenterologist so that they can evaluate and treat you. There's no need to suffer to the extent you're describing and I would presume that any reluctance to have the symptoms promptly evaluated is due to fear of what might be found.
You'll be okay. Take a breath and go see the specialist. They'll get you squared away and you'll be feeling better in no time.
Best regards,
Rutheford Rane, MD (ret.)
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Best regards and Good Health